Rockwell Automation 8520-ARM2 9/Series CNC AMP Reference Manual Documentation Set - Manual (Page 639)

Deskew Parameters
Chapter 36
gt
36-13
Function
This parameter specifies the maximum difference in following error
allowable between servos of a split axis. This distance is actually the
maximum skew limit.
Figure 36.3
Split Axis Skew Distance
Lead screw
Lead screw
This distance is the
amount of skew
or
the difference in
following error
between the two
servos.
Axis
Enter for this parameter a value equal to the greatest amount of skew
(difference in following error) that is acceptable between the servos of
your split axis. When the difference in following error between the two
servos exceeds the value set for this parameter, the control is forced
into E-Stop.
ATTENTION: Make sure the value set here is small enough so
that when a skew of the axis occurs, the control enters E-Stop
before damage to the machine occurs.
Deskew Axis Parameter Number
Single Process Process 1 Process 2
Set 1 All [663] [20663] [21663]
Set 2 All [643] [20643] [21643]
36.4
Excess Skew Limit